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<title>算法训练 Polygon</title>
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 <p>【问题描述】</p>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">&nbsp;Polycarpus<font face="宋体">喜欢凸多边形，尤其喜欢每个角角度都相同，每条边长度都不相同的凸多边形。你需要在知晓给定的顶点数的情况下，为他描绘出这样的任意一个凸多边形。</font></span><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"><o:p></o:p></span></p>
<p>【输入格式】<br />
<span style="color: rgb(34, 34, 34); font-family: 宋体; font-size: 8pt; letter-spacing: 0pt;">&nbsp;输入文件包含一个整数&mdash;&mdash;凸多边形的顶点数</span></p>
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<p>【输出格式】</p>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">&nbsp;输出有<font face="Helvetica Neue">n</font><font face="宋体">行，每行两个实数表示凸多边形的顶点的坐标，按逆时针顺序给出。顶点坐标的绝对值不应该超过</font><font face="Helvetica Neue">1000000</font><font face="宋体">。凸多边形的变成应该在</font><font face="Helvetica Neue">[1,1000]</font><font face="宋体">范围内（不一定是整数）。精度在</font><font face="Helvetica Neue">10^-3</font><font face="宋体">，如果无解请输出&ldquo;</font></span><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 'Helvetica Neue'; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">No&nbsp;solution</span><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">&rdquo;</span><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"><o:p></o:p></span></p>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">&nbsp;（不包含引号）</span><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"><o:p></o:p></span></p>
<p>【样例输入】</p>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">8</span></p>
<p>【样例输出】</p>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="color: rgb(34, 34, 34); letter-spacing: 0pt; font-size: 8pt; font-family: 宋体; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">&nbsp;</span><span style="color: rgb(136, 0, 0); font-family: Consolas, 'Lucida Console', 'Andale Mono', 'Bitstream Vera Sans Mono', 'Courier New', Courier; font-size: 12.6px; line-height: 1.25em; white-space: pre-wrap; background-color: rgb(239, 239, 239);">1.000 0.000</span></p>
<pre style="margin-top: 0px; margin-bottom: 0px; padding: 0.25em; font-size: 12.6px; font-family: Consolas, 'Lucida Console', 'Andale Mono', 'Bitstream Vera Sans Mono', 'Courier New', Courier; line-height: 1.25em; white-space: pre-wrap; word-wrap: break-word; color: rgb(136, 0, 0); background-color: rgb(239, 239, 239);">
7.000 0.000<br />9.000 2.000<br />9.000 3.000<br />5.000 7.000<br />3.000 7.000<br />0.000 4.000<br />0.000 1.000</pre>
<p>【数据规模和约定】</p>
<p>&nbsp;</p>
<p>3&lt;=n&lt;=100</p>